When the sea is unforgiving, you need a watch that has your back.

Veteran sailors have known for centuries that the sea can be treacherous and unforgiving. That’s why the best seagoing timepieces have always been uncompromising. When your life could depend on knowing exactly how much oxygen you have left or on setting the correct course for shore, sailors and divers need a timepiece they can depend on under the worst of circumstances.

Fortis has become a favorite among seagoing adventurers for precisely these reasons. With a Fortis Aquatis timepiece on your wrist, you can be confident that the sea has met its equal. Most Aquatis timepieces feature tough 316L stainless steel cases that are water resistant to an impressive 660 feet. They have screw-down crowns, with clearly marked unidirectional rotating bezels that make it easy for divers to calculate their remaining oxygen supply. These superlative timing tools also feature one of the brightest Superluminova displays available anywhere, making them easy-to-read in even the darkest waters.

Fortis Marinemaster

With its clearly superior design and an abundance of functional features, the popular Fortis Marinemaster exemplifies the ideal diver watch. Among the first things you notice about the 42 mm Marinemaster are the oversized lunettes on the unidirectional color-coded stainless steel bezel. These large, knurled lunettes provide an easy-to-grip surface even when using diving gloves, adding an extra level of confidence for the serious diver. The Marinemaster dial, with its large, uncluttered display and bright white Superluminova numbers and indices is ideal for anyone who spends time on the water.

Fortis B-42 Diver

For divers who prefer a more traditional look, the superlative 42 mm Fortis Diver shares many of the Marinemaster’s features, without the oversized lunettes on the rotating bezel. Both models are available in three-hand and chronograph configurations, with a choice of a fitted Fortis stainless steel bracelet, a comfortable silicon strap, or a luxury topstitched leather band. Certain models are also available with a lightweight titanium case and bracelet.

Fortis Big

Completing the Fortis Aquatis Collection are the unconventional Big models. These oversized 47 mm monsters share the Marinemaster’s unique oversized lunettes, while adding a specially designed unidirectional rubber coated bezel with raised three-dimensional numbers. Unique to the Big is an innovative semi-transparent dial that exposes both the day and date in separate windows, as the two date wheels rotate in opposite directions.

At the heart of all Aquatis Collection timepieces is a reliable and extremely accurate Swiss made automatic mechanical movement with a two-year manufacturer’s warranty that seasoned sailors and divers have learned to depend on. If you find yourself spending time on the water, or under it, you’re going to want a Fortis Aquatis timepiece on your wrist. Before you set sail for your next adventure, be sure to contact an authorized Fortis dealer and ask to see the entire Fortis Aquatis Collection.